mirror of
https://github.com/webmproject/libwebp.git
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90 lines
3.2 KiB
C
90 lines
3.2 KiB
C
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////////
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#include "./fuzz_utils.h"
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#include "src/webp/decode.h"
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int LLVMFuzzerTestOneInput(const uint8_t* const data, size_t size) {
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int w, h;
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if (!WebPGetInfo(data, size, &w, &h)) return 0;
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if ((size_t)w * h > kFuzzPxLimit) return 0;
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const uint8_t value = FuzzHash(data, size);
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uint8_t* buf = NULL;
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// For *Into functions, which decode into an external buffer, an
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// intentionally too small buffer can be given with low probability.
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if (value < 0x16) {
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buf = WebPDecodeRGBA(data, size, &w, &h);
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} else if (value < 0x2b) {
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buf = WebPDecodeBGRA(data, size, &w, &h);
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#if !defined(WEBP_REDUCE_CSP)
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} else if (value < 0x40) {
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buf = WebPDecodeARGB(data, size, &w, &h);
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} else if (value < 0x55) {
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buf = WebPDecodeRGB(data, size, &w, &h);
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} else if (value < 0x6a) {
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buf = WebPDecodeBGR(data, size, &w, &h);
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#endif // !defined(WEBP_REDUCE_CSP)
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} else if (value < 0x7f) {
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uint8_t *u, *v;
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int stride, uv_stride;
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buf = WebPDecodeYUV(data, size, &w, &h, &u, &v, &stride, &uv_stride);
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} else if (value < 0xe8) {
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const int stride = (value < 0xbe ? 4 : 3) * w;
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size_t buf_size = stride * h;
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if (value % 0x10 == 0) buf_size--;
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uint8_t* const ext_buf = (uint8_t*)malloc(buf_size);
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if (value < 0x94) {
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(void)WebPDecodeRGBAInto(data, size, ext_buf, buf_size, stride);
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#if !defined(WEBP_REDUCE_CSP)
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} else if (value < 0xa9) {
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(void)WebPDecodeARGBInto(data, size, ext_buf, buf_size, stride);
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} else if (value < 0xbe) {
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(void)WebPDecodeBGRInto(data, size, ext_buf, buf_size, stride);
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} else if (value < 0xd3) {
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(void)WebPDecodeRGBInto(data, size, ext_buf, buf_size, stride);
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#endif // !defined(WEBP_REDUCE_CSP)
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} else {
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(void)WebPDecodeBGRAInto(data, size, ext_buf, buf_size, stride);
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}
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free(ext_buf);
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} else {
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size_t luma_size = w * h;
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const int uv_stride = (w + 1) / 2;
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size_t u_size = uv_stride * (h + 1) / 2;
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size_t v_size = uv_stride * (h + 1) / 2;
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if (value % 0x10 == 0) {
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if (size & 1) luma_size--;
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if (size & 2) u_size--;
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if (size & 4) v_size--;
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}
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uint8_t* const luma_buf = (uint8_t*)malloc(luma_size);
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uint8_t* const u_buf = (uint8_t*)malloc(u_size);
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uint8_t* const v_buf = (uint8_t*)malloc(v_size);
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(void)WebPDecodeYUVInto(data, size, luma_buf, luma_size,
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w /* luma_stride */, u_buf, u_size, uv_stride,
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v_buf, v_size, uv_stride);
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free(luma_buf);
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free(u_buf);
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free(v_buf);
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}
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if (buf) WebPFree(buf);
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return 0;
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}
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